Mazda CX-5 Service & Repair Manual: Air Fuel Ratio (A/F) Sensor

Mazda CX-5 Service & Repair Manual / Engine / Control / Air Fuel Ratio (A/F) Sensor

Purpose/Function

Detects the oxygen concentration (all-range air/fuel ratio) in the exhaust gas as basic information for mainly determining the fuel injection amount.
Detects the oxygen concentration (all-range air/fuel ratio) in the exhaust gas and inputs it to the PCM as an oxygen concentration (all-range air/fuel ratio) signal.

Construction

Installed to the exhaust manifold.
A zirconium element has been adopted as the detecting element for detecting the oxygen concentration (all-range air/fuel ratio).

Operation

Inputs the signal, which fluctuates according to the oxygen concentration (all-range air/fuel ratio), to the PCM.

A/F sensor characteristic

Fail-safe


DTC No.	Fail-safe function
P0031:00	Stops the fuel feedback control.
P0032:00	Stops the fuel feedback control.
P0130:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0131:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0132:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0134:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P064D:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2237:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2243:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2251:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.

Air Fuel Ratio (A/F) Sensor Removal/Installation

WARNING: A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system. CAUTION: Do not allow fla ...

Camshaft Position (CMP) Sensor Inspection

Intake CMP Sensor Visual inspection CAUTION: When replacing the CMP sensor, make sure there is no foreign material on it such as metal shavings. If it is installed with foreign material, ...

Other materials:

Identification Number Locations
Vehicle Identification Number (VIN) If the VIN plate is adhered to the dashboard, it is located in the position shown in the figure. Engine Type/Number SKYACTIV-G 2.0 SKYACTIV-G 2.5 ...

Winter Driving
Carry emergency gear, including tire chains, window scraper, flares, a small shovel, jumper cables, and a small bag of sand or salt. Ask an Authorized Mazda Dealer to perform the following precautions: l Have the proper ratio of antifreeze in the radiator. • Inspect the battery and its cable ...

Bumper Stiffener Lower Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Seal board upper. b. Front bumper. c. Seal plate. d. Front under cover No.1. 3. Remove bolts A. 4. Pull the bumper stiffener lower in the direction of the arrow (1), (2) shown in the figure, detach hooks ...